Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, 46001 Liberec, Czech Republic.
Molecules. 2021 Feb 26;26(5):1255. doi: 10.3390/molecules26051255.
The main aims of the research were to produce efficient nanofibrous filters with long-term antibacterial properties and to confirm the functionality of samples under real filtration conditions. A polyurethane solution was modified by micro- or nanoparticles of copper oxide in order to juxtapose the aggregation tendency of particles depending on their size. Modified solutions were electrospun by the Nanospider technique. The roller spinning electrode with a needle surface and static wire electrode were used for the production of functionalized nanofibers. The antibacterial properties of the modified nanofibrous layers were studied under simulated conditions of water and air filtration. Particular attention was paid to the fixation mechanism of modifiers in the structure of filters. It was determined that the rotating electrode with the needle surface is more efficient for the spinning of composite solutions due to the continuous mixing and the avoidance of particle precipitation at the bottom of the bath with modified polyurethane. Moreover, it was possible to state that microparticles of copper oxide are more appropriate antimicrobial additives due to their weaker aggregation tendency but stronger fixation in the fibrous structure than nanoparticles. From the results, it is possible to conclude that nanofibers with well-studied durable antibacterial properties may be recommended as excellent materials for water and air filtration applications.
研究的主要目的是制备具有长期抗菌性能的高效纳米纤维过滤器，并在实际过滤条件下确认样品的功能。通过将氧化铜的微/纳米颗粒改性聚氨酯溶液，以根据颗粒的大小来调整颗粒的聚集趋势。改性溶液通过 Nanospider 技术进行静电纺丝。带有针状表面的滚轮旋转电极和静态线电极用于生产功能化的纳米纤维。在水和空气过滤的模拟条件下研究了改性纳米纤维层的抗菌性能。特别关注了改性剂在过滤器结构中的固定机制。由于连续混合以及避免了带有改性聚氨酯的浴槽底部的颗粒沉淀，因此具有针状表面的旋转电极对于复合溶液的纺丝更为有效。此外，可以断言，氧化铜的微颗粒由于其较弱的聚集趋势但比纳米颗粒更强的在纤维结构中的固定性，是更合适的抗菌添加剂。从结果中可以得出结论，具有经过充分研究的持久抗菌性能的纳米纤维可以作为水和空气过滤应用的优秀材料推荐。
